I see it as a life choice, a child should have the chance of growing up with a mother and father, (although I know this obviously doesn't always work), but it's the way the animal kingdom works.
The child wasn't conceived "naturally " into a family environment I'd guess.
For what it's worth, I can see how fertility treatment is great in helping an unfortunate couple to conceive,, but at the end of the day, we were made the way we were, science an' all that....
Far from being homophobic, religious, and don't consider myself to be old fashioned, I do struggle with this myself too, to be honest, nature is still nature after all.....